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For sale by owner
  • $6,995,000

    18 Horsemill Rd, Water Mill, NY 11976

    4beds
    4,194sqft
    Loading
    SingleFamily
    Built in 1937
    0.97 Acres Lot
    $-- Zestimate®
    $1,668/sqft
    $-- HOA

    What's special

    Central airThird bedroom and bathroomCentral vacGaggeneau oven and dishwasherFull basementEntry hallDining room
    In Watermill, one half mile from Mecox Bay, a unique opportunity to be only the third owner of a 1937 farmhouse on a farmer's acre overlooking 70 unobstructed acres of pristine farmland. The first level consists of an entry hall, one bedroom, one bathroom, a living room with a wood burning fireplace, dining room, office, kitchen, laundry room attached to a 2 car garage and a 600 square foot family room adjacent to a patio. The second level has a 600 square foot primary suite with another fireplace and ensuite bath. There is a second bedroom with an ensuite bath as well as a third bedroom and bathroom. The eat-in kitchen has a Traulson refridgerator and Gaggeneau oven and dishwasher. The house has central air, central vac and a security sysrem. There is a full basement with a McClain furnace, 2 water heaters, a sump pump and a smart water shut-off system. The lush exterior is full of mature trees and plantings as well as a secluded 18 by 45 foot inground gunite pool. The house is on a corner lot with double setbacks and 2 driveways with room for further expansion. Asking price: $6.995,000.
    21 days
    |
    1,194
    |
    31
    |
    Listed by:

    Property Owner (917) 576-7657

    This property is for sale by owner and Zillow, Inc. is displaying it at the owner's request. It is not subject to a listing agreement with Zillow, Inc. or its affiliates.

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 4
      • Bathrooms: 4
      • Full bathrooms: 4
      Heating
      • Forced air, Oil
      Cooling
      • Central
      Appliances
      • Included: Dishwasher, Dryer, Freezer, Microwave, Range / Oven, Refrigerator, Washer
      Features
      • Flooring: Hardwood
      • Basement: Unfinished
      • Has fireplace: Yes
      Interior area
      • Total interior livable area: 4,194 sqft

      Property

      Parking
      • Total spaces: 2
      • Parking features: Garage - Attached
      Features
      • Exterior features: Wood
      Lot
      • Size: 0.97 Acres
      Details
      • Parcel number: 0900116000100015000

      Construction

      Type & style
      • Home type: SingleFamily
      Materials
      • Wood
      • Roof: Shake / Shingle
      Condition
      • New construction: No
      • Year built: 1937

      Community & HOA

      Location
      • Region: Water Mill

      Financial & listing details

      • Price per square foot: $1,668/sqft
      • Tax assessed value: $3,245,700
      • Date on market: 7/27/2026

        Estimated market value

        Not available

        Estimated sales range

        Not available

        $7,763/mo

        Price history

        DateEventPrice
        7/27/2026Listed for sale$6,995,000$1,668/sqft
        Source: Owner Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025-- $3,245,700
        2024-- $3,245,700
        2023-- $3,245,700
        2022-- $3,245,700
        2021-- $3,245,700 -3.6%
        2020-- $3,366,700
        2019-- $3,366,700 +2.5%
        2018-- $3,285,600
        2017$14,455 $3,285,600
        2016-- $3,285,600
        2015-- $3,285,600
        2014-- $3,285,600
        2013-- $3,285,600
        2012-- $3,285,600
        2011-- $3,285,600
        2007$13,584 +3.8%$3,285,600 +32.1%
        2005$13,092 +65.4%$2,486,871 +11138.6%
        2004$7,916 +5.1%$22,128
        2003$7,532 +2.9%$22,128
        2002$7,318 $22,128
        Find assessor info on the county website

        Monthly payment

        Estimated monthly payment$1,822
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        See how much you could borrow to make a competitive offer.

        Climate risks

        Neighborhood: 11976

        Getting around

        15 / 100
        Car-Dependent
        28 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating

        A local agent can set up tours, give advice and negotiate with sellers.

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